What is the integral of 1/2 cos(6x) ?

The integral of 1/2 cos(6x) is 1/12 sin(6x)+C

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integral of 1/2 cos(6x)

\int \frac{1}{2} cos (6 x) d x

\frac{1}{12} sin (6 x) + C

Solution steps

\int \frac{1}{2} cos (6 x) d x

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= \frac{1}{2} \cdot \int cos (6 x) d x

Apply u-substitution

: \int cos (u) \frac{1}{6} d u

= \frac{1}{2} \cdot \int cos (u) \frac{1}{6} d u

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= \frac{1}{2} \cdot \frac{1}{6} \cdot \int cos (u) d u

Use the common integral:

\int cos (u) d u = sin (u)

= \frac{1}{2} \cdot \frac{1}{6} sin (u)

Substitute back

u = 6 x

= \frac{1}{2} \cdot \frac{1}{6} sin (6 x)

Simplify

\frac{1}{2} \cdot \frac{1}{6} sin (6 x) : \frac{1}{12} sin (6 x)

= \frac{1}{12} sin (6 x)

Add a constant to the solution

= \frac{1}{12} sin (6 x) + C

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What is the integral of 1/2 cos(6x) ?
The integral of 1/2 cos(6x) is 1/12 sin(6x)+C